MILITARY FABRICS MADE OF HEMP FIBERS
Authors: RASTORHUIEVA, MARIIA; BOIKO, HALYNA; YEVTUSHENKO, VALENTYNA AND ARTEMENKO, MARIIA
Abstract: The relevance of this research is determined by the necessity to replace the existing camouflage fabrics on the Ukrainian market, which are made with synthetic fibers for military clothing, with eco-friendly fabrics produced from natural raw materials – hemp fiber. The aim was to analyze the qualitative properties of mixed hemp fabrics developed by scientists of Kherson National Technical University and to determine their potential use in military uniforms. Comprehensive methods of analysis, synthesis, observation, measurement, comparison, and generalization of results were applied, as well as standard methodologies widely used in the light industry. The paper provides a detailed analysis of the current state of the global protective and military textile market. Samples of existing camouflage fabrics for military uniforms and equipment were examined, and results of testing new hemp fiber-based fabrics were presented. Physico-mechanical, aesthetic, and operational tests demonstrated that hemp-based materials surpass most existing analogs in their qualitative characteristics. The introduction of hemp fabrics into military textile production may ensure increased reliability, functionality, and environmental safety of defense products.
Keywords: Assortment, Camouflage Fabrics, Comparative Analysis, Mixed Hemp Fabrics, Properties, Purpose.
Pages: 1-10
PERCOLATION-GOVERNED FORMATION OF CONDUCTIVE NETWORKS IN POLYANILINE-FUNCTIONALIZED TEXTILE COMPOSITES
Authors: REDKO, YANA AND HUDZENKO, NATALIIA
Abstract: Conductive polyaniline (PANI)-based textiles are developed using a heterocoagulation-controlled deposition mechanism. In contrast to conventional in situ polymerization, this approach exploits the interaction between oppositely charged PANI particles and textile substrates to form specialized percolation networks. Polyamide substrates form highly interconnected networks with excellent conductivity, while cotton nonwovens exhibit less regular pathways. The heterocoagulation approach allows for fine-tuning of the layer structure, lowers the percolation threshold, achieves high conductivity while maintaining textile flexibility, and enhances durability against washing, dry, and wet rubbing. This methodology presents a systematic approach for controlling the structure–property–percolation relationship in conductive textiles, enabling potential applications in sensors, antistatic fabrics, and flexible electronics.
Keywords: Polyaniline; Heterocoagulation; Electrically conductive textiles; Percolation networks; Textile materials; Surfactant-assisted deposition.
Pages: 11-17
MAGNETISABLE MELT-SPUN FIBRES PRODUCED AS LIQUID-CORE HOLLOW FIBRES: DEVELOPMENT OF FIBRES AND EFFECTS OF MAGNETISABILITY
Authors: KÖLSCH, LENA; SCHNOCK, OLIVER; FISCHER, HOLGER AND MAY, DAVID
Abstract: Magnetisable fibres, among others, can be used for targeted fibre arrangement or fixing by use of a magnetic fields, antistatic properties or shielding against electromagnetic fields. In some cases the application requires to keep the functional, magnetic component separate from the environment. Liquid-filled hollow fibres are a promising candidate for this purpose, as the fibre hull material can be chosen to keep optimal interaction with the surrounding environment, while the liquid-phase allows for introduction of large fractions of fillers. In this study, a novel strategy to achieve magnetisable fibres was investigated. By melt spinning, hollow polyethylene fibres were produced and in situ filled with a liquid containing iron oxide particles. As reference, polypropylene monofilaments were melt spun, where the iron oxide particles were compounded into the polymer prior to melt spinning. Both processes were successfully implemented, however in the first strategy the ferrofluid caused deficient process robustness due to nozzle clogging and thermal instability. For rough access of the achievable magnetisability, hollow fibres were filled manually with a ferrofluid. To evaluate magnetic functionality, a custom-built measurement unit was developed for quantifying the magnetic attraction force of fibre samples. The measured magnetic detachment forces of the ferrofluid-filled samples were 17.0 ±0.8 mN and therefore in the range of the monofilaments, where values from 11.4 ±0.7 mN to 26.6 ±1.8 mN were measured, depending on fibre diameter and iron content.
Keywords: Melt spinning; Hollow fibre; Low-pressure filling; Magnetisable fibres; Magnetisability measurement.
Pages: 18-26